def test_equal_1(self): self.assertEqual(litres(2), 1)
def test_equal_2(self): self.assertEqual(litres(1.4), 0)
def test_equal_7(self): self.assertEqual(litres(0), 0)
def test_equal_6(self): self.assertEqual(litres(1787), 893)
def test_equal_5(self): self.assertEqual(litres(11.8), 5)
def test_equal_4(self): self.assertEqual(litres(0.82), 0)
def test_equal_3(self): self.assertEqual(litres(12.3), 6)